Filter.



A. UHDE.

v FILTER. APPLICATION FILED 00T127, 1910.

Patented Apr. 11,1911.

2 BHEBTBTBHEET 2.

. ilzl $22 WIT/758858 ADOLPH UHDE, OF NEW YORK, N. Y.

FILTER.

Specification of Letters Patent.

Patented Apr. 11, 1911.

Application filed October 27, 1910. Serial No. 589,428.

To all whom it may concern:

Be it known that I, AnoLrn UHDE, a citizen of Germany, residing at NewYork city, county and State of New York, have invented certain new anduseful Improvements in Filters, of which the following is aspecification.

This invention relates to a filter for Water, beer and other liquidswhich is so constructed that the liquid to be filtered may within oneand the same apparatus be subjected to either a single or a doublefiltering operation. In this way the necessity of duplicating the filterwhenever the liquid is to be sent twice therethrough is entirelyobviated.

In the accompanying drawings: Figure 1 is a plan of a filter embodyingmy invention; Fig. 2 a face view of one of the filter grates andadjoining parts; Fig. 3 an enlarged horizontal section on line 3-3, Fig.2, and Fig. 4 an enlarged vertical section on line 4. -4, Fig. 2.

The filter is composed of a plurality of parallel upright grates 10 oflike construction suspended from a pair of horizon tal rods 11 orotherwise. The grates are spaced from each other by intervening frames12 packed as at 13 and forming filtering chambers 14 which are chargedwith a suitable filtering material as indicated in Fig. 4. Each grate 10has an outer rim 15 which registers substantially with frame 12 and isintegral with a circumferential inner web 16 which in turn is integralwith the grate bars 17. At the top there is formed in each grate atransverse llquid inlet 18 and a liquid outlet 19, alined withcorresponding openings 20, 21. of frames 12. In this way there is formeda continuous inlet channel and a similar parallel outlet channel,extending through the entire length of the filter. The inlet channel 18,2O communicates with each of the filter chambers 14: along both sides ofalternating webs 16 by ducts 22. The intervening grates communicate bysimilar ducts 23 with the outlet channel 19, 21. The

liquid to be filtered is admitted into the inlet channel from which itflows through ducts 22 into chambers 14. Here the liquid which is underpressure is forced through the filtering material and thence out throughducts 28 to be discharged into the outlet channel.

In practice a suitable number of filtering plates are assembled andflanked by heads 24, 25 having inlet and outlet nozzles 26, 27respectively. The filtering plates are divided into two equal groups bya central partition 28 made of greater thickness than frames 12. lVithinthis partition are fitted a pair of three way cocks 29, 30 connected bya transverse duct 31 formed in partition 28. These cocks may either heset to establish communication respectively between the front and rearportions of the inlet channel and the front and rear portions of theoutlet channel or between the front portion of the outlet channel andthe rear portion of the inlet channel. In the first case the liquid issubjected to a single filtering operation only and is then carried offthrough the outlet channel and nozzle 27. In the second case the liquid,after being subjected to a first filtering operation is led from thefront section of the outlet channel by cock 30, duct 81 and cook 29 andconveyed to the rear section of the inlet channel so as to be subjectedto a second filtering operation before reaching nozzle 27.

It is preferred to so arrange cocks 29, 30 that they will besimultaneously set. For this purpose the stems of the cooks areintergeared as at 32 while one of the stems carries a hand wheel 33.

As described, each filtering chamber has a single upper inlet andoutlet, while in practice there are also provided lower inlets andoutlets, which are in all respects duplicates of the corresponding upperparts and need therefore not be further referred to;

It will be seen that by the invention described, a single apparatus mayeffect a single or double filtration, so that the apparatus may bereadily set for different materials and for different grades offiltrate.

I claim:

1. A filter comprising two sets of juxtaposed filtering plates andintervening filtering chambers, each set having an inlet channcl and anoutlet channel passing through all of its plates, and a partitioninterposed between the plate-sets and having a passage adapted toconnect the outlet channel of the first plate-set with the inlet channelof the second plate set.

2. A filter comprising two sets of juxtaposed filtering plates andintervening filtering chambers, each set having an inlet channel and anoutlet channel passing through all of its plates, a partition interposedbetween the plate sets, and a pair of three-way cocks and a transverseduct within the partition for respectively connecting the inlet channeland outlet channel of the first set with the corresponding channels ofthe second set, or for connecting the outlet channel of the first setWith the inlet channel of the second set.

3. A filter comprising tWo sets of juxtaposed filtering plates andintervening filtering chambers, each set having an inlet channel and anoutlet channel passing through all of its, plates, a partitioninterposed betwe n the plate-sets, a pair of three-way cocks and atransverse duct Within the partition for respectively connecting theinlet channel and outlet channel of the first set with the correspondingchannels of the second set, or for connecting the outlet channel of thefirst set With the inlet channel of the second set, and means forsimultaneously setting said cocks.

ADOLPH UHDE. lVitnesses:

FRANK v-. BRIESIJN, KATHERYNE KooH.

Copies f thi patien may e obtain d fo fiv c t ach, yad ressi gthe miienei Qt i hens.- Washing-ton, D. C.

